/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.autoscaler.event;

import org.apache.flink.autoscaler.JobAutoScalerContext;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nullable;

import java.time.Duration;

/** Autoscaler event handler which logs events. */
public class LoggingEventHandler<KEY, Context extends JobAutoScalerContext<KEY>>
        implements AutoScalerEventHandler<KEY, Context> {

    private static final Logger LOG = LoggerFactory.getLogger(LoggingEventHandler.class);

    @Override
    public void handleEvent(
            Context context,
            Type type,
            String reason,
            String message,
            @Nullable String messageKey,
            @Nullable Duration interval) {
        LOG.info(
                "Autoscaler event, job key : {}, type : {}, reason : {}, message : {}, messageKey : {}, interval : {}.",
                context.getJobKey(),
                type,
                reason,
                message,
                messageKey,
                interval);
    }
}
